Kodama of the East Tree + Petrified Field + Echoing Deeps + Greensleeves, Maro-Sorcerer + Spelunking

Kodama of the East Tree
Petrified Field
Echoing Deeps
Greensleeves, Maro-Sorcerer
Spelunking

Requires
Kodama of the East Tree must be on the battlefield. Petrified Field must be in hand. Echoing Deeps must be in the graveyard. Greensleeves, Maro-Sorcerer must be on the battlefield. Spelunking must be on the battlefield.
Steps
  1. Play Petrified Field.
  2. When Petrified Field enters the battlefield, Kodama of the East Tree and Greensleeves trigger.
  3. Resolve the Kodama of the East Tree trigger, putting nothing onto the battlefield.
  4. Holding priority, activate Petrified Field's second ability by tapping and sacrificing it, returning Echoing Deeps from your graveyard to your hand.
  5. Resolve the Greensleeves trigger, creating a token.
  6. When the token enters the battlefield, Kodama of the East Tree triggers, putting Echoing Deeps from your hand onto the battlefield untapped as a copy of Petrified Field.
  7. When Echoing Deeps enters the battlefield, Greensleeves triggers.
  8. Holding priority, activate Echoing Deeps using Petrified Field's second ability by tapping and sacrificing it, returning Petrified Field from your graveyard to your hand.
  9. Resolve the Greensleeves trigger, creating a token.
  10. When the token enters the battlefield, Kodama of the East Tree triggers, putting Petrified Field from your hand onto the battlefield.
  11. When Petrified Field enters the battlefield, Greensleeves triggers.
  12. Repeat from step 4.
Results
Infinite creature tokens. Infinite ETB. Infinite landfall triggers.

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